I've known a couple of
Janice people who would certainly count as old ladies - born in late 40s, early 50s. I don't mind the name, but it's not my style and I'd never consider using it. I far prefer
Janet, which is probably even older.
Nancy isn't really used where I live. I knew a
Nancy who lived here in South
Africa but was British; she hated her name and went by
Nan. And I had a colleague whom I never met - she used to send out emails to staff which showed her name as Nancy-Ann (or maybe Nancy-Anne), but she signed them NAnn! I don't know what her parents were thinking: perhaps they had two people they really, really wanted to honour. I like
Nancy a lot and would consider using it IRL.
For the record, I've known a few Afrikaans women named
Anna who were known as Ansie - sounds like Unsy.